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Solar Panel calculator

Unsure of what a solar installation will cost? Take out the guesswork with tailored answers in just a few clicks.

Why use our calculator?

With the rising cost of energy in the UK and an increasing focus on sustainability, installing solar panels is a smart investment for your home or business. Our Solar Panel Calculator takes the guesswork out of the process, providing you with tailored answers in just a few clicks.

How many solar panels will you need?

What size system is right for you?

How much money could you actually save?

Explore our installation costs

Ready to save with solar? We can help if you own your home and your roof isn't thatched.

Hi ,
Besides saving money on your utility bill, what else motivates you to go solar?
(please choose one)

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Be more Green

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Use more Power
Guilt Free
(i.e. AC/Devices)

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Fear of Outages
(i.e. Grid Down)

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Cash in on 'Going
Solar' Incentives

What best describes you?

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I’m retired or dreaming of retirement

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I just bought my first home

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I’m ready to start my career/family

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My kids are in college

Fill in the blank. "When picking a solar partner, getting the best            is most important to me."
(please choose one)

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Warranty

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Value

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Technology

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Company

What Solution would you like?

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Solar PV only

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Solar PV

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+ Storage

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Solar PV

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+ EV

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Solar PV

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+ Storage

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+ EV

What best describes you?

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I have an EV

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I want an EV

What's your address?

We're calculating your system size

Recommended System Size


Environmental Impact ( years)

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metric tons


Number of Panels:

System size:

Battery:

How do you plan on aquiring your system?

Number of Panels:

System size:

Battery:

Environmental Impact
( years)

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metric tons


Number of Panels:

System size:

Battery:

Book your appointment


We always carry out a site survey to ensure you can get the best from your investment.

Thanks


We look forward to seeing you soon.
Step 1/

What Solution would you like?

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Solar PV only

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Solar PV

Icon

+ Storage

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Solar PV

Icon

+ EV

Icon

Solar PV

Icon

+ Storage

Icon

+ EV

What best describes you?

Icon

I have an EV

Icon

I want an EV

What's your address?

We're calculating your system size

Recommended System Size


Environmental Impact ( years)

Icon

metric tons


Number of Panels:

System size:

Battery:

How do you plan on aquiring your system?

Number of Panels:

System size:

Battery:

Environmental Impact
( years)

Icon

metric tons


Number of Panels:

System size:

Battery:

Book your appointment


We always carry out a site survey to ensure you can get the best from your investment.

Thanks


We look forward to seeing you soon.
Step 1/

How the Solar Panel Calculator Works.

Our Solar Panel Calculator is designed to give you a quick, accurate estimate based on your specific needs. Simply enter details about your property, energy usage, and location, and the calculator will determine:

  • Number of panels needed: Based on your roof size and energy consumption.
  • System size: The total capacity of your solar panel system in kilowatts (kW).
  • Potential savings: How much you could save annually by generating your own electricity.
  • Carbon footprint reduction: The environmental impact of switching to solar energy.

 

 

Factors That Affect Your Solar Panel Needs.

Energy Usage

Your household’s or business’s annual energy consumption is a key factor. The more energy you use, the larger the system you'll need.

Roof Size and Orientation

We always take into account your roof’s size, shape, and orientation (south-facing roofs are ideal in the UK).

Sunlight Availability

While the UK isn’t known for its sunshine, solar panels still perform well here, especially in areas with minimal shading.

Battery Storage

Adding a solar battery can increase your savings by storing unused energy for later use.

How Much Money Can You Save with Solar Panels?

The savings depend on various factors, including energy usage, electricity tariffs, and government incentives. On average, UK households save between £850 and £1,300 annually on electricity bills. With solar batteries, you can maximise savings by using stored energy during peak rate hours. To find out how much you could save with a solar panel installation, use our Solar Panel Calculator above or visit our savings page!

Get Started Today!

Switching to solar power is one of the best ways to save money and reduce your carbon footprint. Use our Solar Panel Calculator now to find out how much you could save and how many panels you’ll need. Contact us for a free consultation and take the first step towards a brighter, more sustainable future.

What do our clients say?

Check out our Google reviews

  • I can’t believe how easily the whole experience went. I called up and luckily they were in my area so came to see me the same day. We agreed what... read more

    Kevin Morris Avatar Kevin Morris
    04/03/2026

    A superb performance and excellent product. The team are clean, tidy, courteous and extremely knowledgeable about all aspects of their product. Highly recommended and Mark is a professional and knowledgeable... read more

    Rob Wilkins Avatar Rob Wilkins
    29/01/2026
  • The installation of our solar panels and battery by Fit Solar was carried out without any problems and Mark and his team were very helpful throughout the job and would... read more

    Julian Wilson Avatar Julian Wilson
    28/01/2026

    Fit solar came in early September and within 48 hours the array had filled my battery and started export to the grid. Despite it being late in the year and... read more

    John Hancox Avatar John Hancox
    27/01/2026
  • Fit solar installed a 20kwh Fox battery system for us. It was fitted in 1.5 days with minimal disruption. It is now saving us thousands of £ per year, simply... read more

    Mike Wooldridge Avatar Mike Wooldridge
    26/01/2026

    Extremely glad I chose Fit Solar, they did a first class job from start to finish, nothing was too much trouble, a brilliant positive team . I am and will continue... read more

    Phil Thorne Avatar Phil Thorne
    22/01/2026
  • We bought a solar battery system through them. They gave great advice and a very competitive price. They took care and pride in their work on the installation and guided... read more

    Mark Clubb Avatar Mark Clubb
    22/01/2026

    Excellent local solar installer. Just had 21 solar panels fitted, givenergy battery, inverter and car charger. Installation started sooner than I expected and communication was very good. Any issues or queries... read more

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    Alex Lattimore Avatar Alex Lattimore
    12/04/2025
  • Cant fault them . I used fit solar to upgrade my existing battery area after trying the installer of my current system wanted x2 the price of what Fit solar... read more

    lhud64 Avatar lhud64
    07/03/2025

    These guys did an amazing job. The installation was straight forward with zero mess or inconvenience. Mark gave me full instructions on how to work the app. And it's all... read more

    The Daddy Avatar The Daddy
    07/03/2025
  • Cant fault them . I used fit solar to upgrade my existing battery area after trying the installer of my current system wanted x2 the price of what Fit solar... read more

    lhud64 Avatar lhud64
    06/03/2025

    These guys did an amazing job. The installation was straight forward with zero mess or inconvenience. Mark gave me full instructions on how to work the app. And it's all... read more

    The Daddy Avatar The Daddy
    15/02/2025
  • I was recommended by a friend to approach FitSolar for a quote to install a ten-panel solar system having already obtained quotes from four other local and national firms. Mark... read more

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    Mark Dickens Avatar Mark Dickens
    13/12/2023

    I was recommended by a friend to approach FitSolar for a quote to install a ten-panel solar system having already obtained quotes from four other local and national firms. Mark... read more

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    Mark Dickens Avatar Mark Dickens
    30/11/2023
  • We have been really impressed with the quality of work carried out throughout the whole process of planning and fitting our Solar energy system. The team were organised, communicated well... read more

    Nicola Price Avatar Nicola Price
    13/09/2023

    After several proposals and quotes we chose Fit Solar to install our system, absolutely no regrets, cost effective,professional advice and installation by a considerate and capable team.

    media thumbnail 0media thumbnail 1
    John Goodman Avatar John Goodman
    13/09/2023
  • I was recommended FIT Solar by another electrician. From the first contact they were timely, efficient and very knowledgeable. I followed their recommendations and I could not be happier with... read more

    Paul Francis Avatar Paul Francis
    13/09/2023

    We have been really impressed with the quality of work carried out throughout the whole process of planning and fitting our Solar energy system. The team were organised, communicated well... read more

    Nicola Price Avatar Nicola Price
    29/08/2023
  • After several proposals and quotes we chose Fit Solar to install our system, absolutely no regrets, cost effective,professional advice and installation by a considerate and capable team.

    media thumbnail 0media thumbnail 1
    John Goodman Avatar John Goodman
    31/05/2023

    I was recommended FIT Solar by another electrician. From the first contact they were timely, efficient and very knowledgeable. I followed their recommendations and I could not be happier with... read more

    Paul Francis Avatar Paul Francis
    17/05/2023
  • After several proposals and quotes we chose Fit Solar to install our system, absolutely no regrets, cost effective,professional advice and installation by a considerate and capable team.

    media thumbnail 0media thumbnail 1
    John Goodman Avatar John Goodman
    13/09/2023
  • Cant fault them . I used fit solar to upgrade my existing battery area after trying the installer of my current system wanted x2 the price of what Fit solar wanted to increase the battery size. Their was a few issues mixing 2 different versions of FOXess batteries, but with there help all fixed. Nothing was to much trouble for them. A1 company. Lee

    lhud64 Avatar lhud64
    07/03/2025
  • After several proposals and quotes we chose Fit Solar to install our system, absolutely no regrets, cost effective,professional advice and installation by a considerate and capable team.

    media thumbnail 0media thumbnail 1
    John Goodman Avatar John Goodman
    31/05/2023
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